Metal-saw.



PATENTED SEPT. 11, 1906.

H. R. GEER.

METAL SAW.

APPLICATION FILED mom. 1004.

AWAY.

' Harry R. fimgiz IVIIIVESSES,

To all whom it viz/my concern..-

PATENT @FhiQE.

HARRY it. GEEK, 0 JOI-INS'I.()WN, PENNSYLVANIA.

METAL-saw.

No. ssavvs.

Specification of Letters Patent.

Patented Sept. 1 1, 1906,

Application filed December 31. 1904. Serial No. 239,109.

Be it known that I, HARRY R. GEEK, a citizen of the United States, residing at Johnstown, in the county of Cainbria and State of Penney ania, have invented certain new and useful Improvements in Metal Saws; and I do hereby declare the following to bea full, clear, and exact description of the inven tion, such as will enable others skilled in the art to which it appcrtains to make and use the same.

My invention relates to improvements in metal-saws that have inserted saw-teeth made of pieces of metal independent of the saw-blade; and it especially relates to means for holding said inserted saw-teeth in their operative positions and an adjustable look ing device therefor.

Certain of my objects are to provide an adjustable locking-piece which will extend near to the cutting edge of the sawtooth, and thus thoroughly su port the same, said locking-piece being pre erably corn osed of position.

comparatively soft steel, iron, or 0t 161 suitable material and so formed as to permit its use .in connection with drpp -forged sawteeth, which are practically in their rough or forged state with the exception of their cut ting edges, which are ground.

Further objects of my invention are to provide means whereby inserted saw-teeth can be quickly adjusted, easily removed, and rigidly held in their operative position.

in general my invention consists of a circular metallic saw blade or disk, preferably of hard and stiff steel or other suitable material, rovided with a series of recesses in its perip iery, a socket extending from the bottom of each recess to an aperture in the sawblade, a series of inserted teeth mounted in said recesses, and a locking-piece for each tooth comprising a truncated wedge-shaped body portion provided with interlocking means mounted in each recess, the body por tion of said locking-piece being also provided with a projecting shank or stud adapted to extend through said socket and into said aperture, the end of said stud within said aperture having means for adjusting and securing the same and its attached locking-piece in Having thus given a general description of my invention, 1 will now, in order to make the same more clear, refer to the one sheet of drawings,which form part of this specificaence refer to like parts.

F i ure 1 is a side elevation of a portion of a saw isk or blade with my improved adjustable inserted locking device in operative po .sition. Fig. 2 is a section taken on the line 2 2 of Fig. 1,while Fig. 3 is a front elevation of a follower-tooth, and Fig. 4 is a bottom plan view of the same. Fig. 5 is a front elevation of a leader-tooth, while Fig. 6 is a bottom plan view thereof, and Fig. 7 is a perspective view of my improved locking-piece.

Referring now to the various characters of reference shown on the drawings, 1 represents my improved device com osed of a body portion 2, which has a shan or stud 3 projecting from the small end 4 thereof. The

tenon 5, projecting from the sloping side 6, and a semicircular groove 7, formed in the slo ing side 8, while the parallel sides 9, the en 10, and means for adjusting and securing the locking device, shown as the nut 11, constitute the remaining elementsv of my improved locking-piece.

Referring now to Fig. 1, the locking-piece 1 is adjustably mounted in the saw disk or blade 12 and secured therein by the aid of the stud 3 and the nut 11, while the stud 3 is inserted in the socket 13, extending from the bottom of the recess 19,. and said lockingpiece is further held in position by means of the saw-disk. T he locking-piece is provided with a groove 7, which interlocks with the curved surface 15 of the saw-tooth 16 or 17, and thereby holds said teeth in )osition laterally. l leader-tooth, the cutting portion of which is narrower than and rojects farther from the center of the sawisk than its companion tooth 17, which latter is known as a follower-tooth, the cutting edges of whigh are broader than and its extreme edge 1s set nearer to the axis of the saw-disk than the corresponding portions of the leadentooth, as may be clearly seen on reference to the drawings. 18 is anaperture in the saw-blade 12 at the inner opening of the socket 13, and alfords a, housing for the nut 11-, while its side also acts as a bearing-surface for the same.

By the aid. of my improved lockingiece I am able to use insertible drop-forget saw- .teeth practically intheir rough state with no tion, and in which like characters of rcfer-.

body portion 2 is further provided with a the tenon 5, which fits into the groove 14 of 16 represents what is mown as .a

machining required other than the grinding 11o of their cutting edges, While the high backing affordcr'l by my locking-piece greatly stiffens and reinforces the saw-tooth, Whereas in the connnon form of inserted cold saw-teethno backing is furnished for the tooth beyond the periphery of the savvdisk. Furthermore,

my improved locking-piece being constructed of softer metal than that composing the saw many plane sides as possible, thus conducing to ease and economy of manufacture and maintenance, I arrange the front surface of the recess in the saw-disk in a direction wi h if prolonged would be tangent to a generating circle smaller than that of the sarmii .h, but having the same center, thereby giving the front edges of the teeth an inclination and clearance which would not be obtained with this simple form of teeth if they were set on red ial lines.

The inclinations of the front edges of the teeth are indicated in Fig. 1 as they are set at an angle with theradial dotted lines originatingin the center of the saw-disk, as marked at C in the lower portion of the sheet;

Although I have shown and described my invention in considerable detail 1' do not limit myself to the exact details shown or described, as it is evident that various details of construction. such as the aperture and recess in the said blade, also the form of the lockingpiece itself, together with the details shown for interlocking it with the saw blade and tooth, and the means for securing it inposition might be modified Without departing from the spirit of my invention, and i there fore'reserve the right to use such suhstitutions', modifications, or equivalents thereof as are embraced Within the scope of my invention and as pointed out in the claims.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is I v 1. In a metal-cutting saw, the combination of the disk, a tooth-receiving recess in the periphery thereof, a tooth removahly in- I I l l seems sorted in said recess, a transverse aperture in sorted in said recess, a transverse a eerture in the dish, a socket leading from the recess t0 the aperture, and a combined tooth-support and locking device adjustahly secured in the recess behind the tooth, said s11 port and locking device having a shanfr passing through the socket and provided with an ad justingmut in'the aperture.

In a metal-euttin saw, the combination of the dish, a tootii receiving recess'in the periphery thereof, a tooth removably inserted in said recess, and a tooth-locking device adjustahly secured in the recess, said locking device being com osed of metal softer than that of the disk or the tooth.

A metal cutting saw provided with a series of tra ezoidal peripheral. recesses, each ofwhich as a plane front surface and a grooved rear surface, a socket extending from said recess through the saw-disl and connecting with an aperture formed in said dish, a sawtooth mounted in said recess, a locking device comprising a body portion of blunt Wedge tons, a tenon on said wedge 00 operating with the groove aforesaid, a shank proj rt ing rose the smaller end of said Wedge throw h said socket, and means mounted on the "projecting end of said shank and Within said aperture for hoiding and adjusting the Wedge aforesaid.

, 5. A. metal-cutting saw comprising a body or blade havinv recesses in its edge, a cutting-tooth seated in each recess and abutting against the bottomand front walls thereof, a

retainer between the tooth and rear wall of:

the recess and having its front surface in contact throughout its length with the rear of the tooth and its rear surface in extended contact with the rear Wall of the recess.

In testimony whereof I hereto affix my signature in the presence of two Witnesses.

HARRY R. GEER. Witnesses:

Geo. Bnarrr, ELMER SEAVEY. 

